Haemophilus influenzae Age (n = 407) 40.59 (6.7) Number (%) a 413 414 400 411 412 (n = 405) (n = 261) <0.001 (4.1-219.3) No 29.44 <0.001 3.9 No (1.2-14.5) No (1.2-14.5) No 8.522 0.035 2.9 (1.4-6.1) No 8.6803 0.003 5.2 No 12.198 <0.001 3.7 (1.7-7.9) No <0.001 2.4 No